PLASMA VOLUME CHANGES FOLLOWING EXERCISE AND THERMAL DEHYDRATION.
No abstract available.
SIMULTANEOUS DETERMINATION OF FLUID SHIFTS DURING THERMAL STRESS IN A SMALL-ANIMAL MODEL.
We have developed methodology to simultaneously measure fluid redistribution among the major compartments during moderate and severe hypohydration. Total body water (TBW) was determined using tritiated water, extracellular fluid volume (ECF) was measured using a single-injection [14C]inulin technique, and plasma volume (PV) was determined by indocyanine green dye dilution. Moderate (10% decrease in body wt) [...]
BODY COMPOSITION OF THE MALE REFERENCE INFANT DURING THE FIRST YEAR OF LIFE
No abstract available.
RESPONSES OF BODY FLUID COMPARTMENTS TO HEAT AND COLD.
No abstract available.
ENERGY AND WATER METABOLISM, BODY COMPOSITION, AND HORMONAL CHANGES INDUCED BY 42 DAYS OF ENFORCED INACTIVITY AND SIMULATED WEIGHTLESSNESS.
Inactivity causes profound deleterious changes. We investigated in eight healthy men the impact of a 42-day head-down bed rest (HDBR) on energy and water metabolism and their interrelationships with body composition (BC) and catabolic and anabolic hormones. Total energy expenditure (TEE), total body water, water turnover, and metabolic water formation were assessed by the doubly [...]
RESPONSES TO DEHYDRATION AND REHYDRATION DURING HEAT EXPOSURE IN YOUNG AND OLDER MEN.
Body temperature, plasma responses, and subjective ratings of thirst and hotness were studied in 5 older men (OM, 61-67 yr) and 6 younger men (YM, 21-29 yr) during 180-min thermal dehydration and subsequent 60-min rehydration (45 degrees C, 25% relative humidity). Rectal temperature (Tre) increased more rapidly and to a greater magnitude in OM, while [...]
BODY COMPOSITION IN PREGNANCY.
Concern over the influence of pregnancy-related alterations in hydration has prompted questions regarding the accuracy of using standard methods of determining body composition. We sought to investigate whether differences exist between body composition determined at 30 weeks and 39 weeks of gestation and postpartum, when measured by both bioelectrical impedance and hydrostatic weighing. This preliminary [...]
Water distribution in the foetus and newborn infant.
A short survey is given over changes in water metabolism from early foetal life to infancy. The close connection between water metabolism and body composition is described as well as the changes taking place after birth. The impact of intrauterine malnutrition, delivery and postnatal nutrition is discussed. PMID: 6351536 [PubMed - indexed for MEDLINE
The hydration profile of female cricket players during competition.
This study investigated the hydration profile of high-performance female cricket players competing at a national tournament. The profile comprised hydration monitoring (n=18) and a questionnaire (n=20). Our objectives were to 1) advance the understanding of fluid losses in cricket sessions across a tournament and 2) assess the hydration knowledge and practices in female cricket players. [...]
Plasma volume changes during and after acute variations of body hydration level in humans.
This study examined plasma volume changes (deltaPV) in humans during periods with or without changes in body hydration: exercise-induced dehydration, heat-induced dehydration and glycerol hyperhydration. Repeated measurements of plasma volume were made after two injections of Evans blue. Results were compared to deltaPV calculated from haematocrit (Hct) and blood haemoglobin concentration ([Hb]). Eight well-trained men [...]